Table 3.
ET and WUE under different combinations of BC and N levels.
| Treatment | ET(mm) | WUE(kg·ha-1·mm-1) | ||
|---|---|---|---|---|
| 2021 | 2022 | 2021 | 2022 | |
| C0N1 | 664.37 ± 5.49c | 830.32 ± 1.98ab | 12.98 ± 0.27e | 10.65 ± 0.27c |
| C0N2 | 670.42 ± 2.63ab | 832.41 ± 2 08a | 13.00 ± 0.40e | 12.81 ± 0.40b |
| C0N3 | 672.73 ± 3.41a | 834.65 ± 2.21a | 13.13 ± 0.32e | 12.28 ± 0.32b |
| C1N1 | 657.99 ± 2.22abc | 812.24 ± 1.68e | 14.88 ± 0.54c | 13.53 ± 0.54ab |
| C1N2 | 664.37 ± 2.92bc | 813.05 ± 3.43de | 16.57 ± 0.38a | 14.90 ± 0.38a |
| C1N3 | 665.68 ± 4.00abc | 818.12 ± 3.17cde | 15.86 ± 0.40b | 13.68 ± 0.40ab |
| C2N1 | 662.68 ± 4.09bc | 817.28 ± 2.82cde | 14.05 ± 0.30d | 11.09 ± 0.30c |
| C2N2 | 665.17 ± 4.26a | 821.15 ± 5.58cd | 15.12 ± 0.17c | 12.51 ± 0.17b |
| C2N3 | 667.46 ± 6.41bc | 822.25 ± 4.87bc | 14.52 ± 0.88cd | 13.26 ± 0.88b |
| C | 3.69* | 46.32* | 144.71** | 24.06** |
| N | 4.37* | 3.52* | 16.64** | 14.25** |
| C·N | 0.16 | 0.22 | 4.70** | 2.39 |
Values represent mean ± standard deviation of 3 replicates. * Indicates that the effect is significant at a level less than 0.05, and ** indicates that it is extremely significant at a level less than 0.01. BC application rates: 0 t ha-1 (C0), 15 t ha-1 (C1) and 30 t ha-1 (C2); N application rates: 135 kg ha-1 (N1), 180 kg ha-1 (N2), 225 kg ha-1 (N3). BC was mixed uniformly into the soil at a depth of 30 cm before sowing in 2021 but was not applied in the following year. N fertilizer was applied before sowing in the two years.